Digestion of diacylglycerol isomers by gastric and pancreatic lipases and its impact on the metabolic pathways of TAG re-synthesis in enterocytes
New publication in the journal Biochemistry, 15 January 2022
The specific activities of gastric and pancreatic lipases were measured using triacylglycerols (TAG) from rapeseed oil, purified 1,3-sn-DAG and 1,2(2,3)-sn-DAG produced from this oil, as well as a rapeseed oil enriched with 40% w/w DAG (DAGOIL). Gastric lipase was more active on 1,3-sn-DAG than on 1,2(2,3)-sn-DAG and TAG, whereas pancreatic lipase displayed a reverse selectivity with a higher activity on TAG than on DAG taken as initial substrates. However, in both cases, the highest activities were displayed on DAGOIL. These findings show that DAG mixed with TAG, such as in the course of digestion, is a better substrate for lipases than TAG. The same rapeseed oil acylglycerols were used to investigate intestinal fat absorption in rats with mesenteric lymph duct cannulation.
a Aix Marseille Univ, CNRS, UMR7281 Bioenergetics and Protein Engineering, 31 Chemin Joseph Aiguier, 13009, Marseille, France
b ITERG, Equipe Nutrition, Santé et Biochimie des Lipides, F-33610, Canejan, France
c Univ-Lyon, CarMeN laboratory, INRAE UMR1397, INSERM U1060, INSA-Lyon, Université Claude Bernard Lyon 1, F-69621, Villeurbanne, France
Online access: https://www.sciencedirect.com/science/article/abs/pii/S0300908422000128#!